implement codegen support for preinc as an lvalue, PR5514.
llvm-svn: 93076
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index 2c2b76f..5809d1e 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -1120,8 +1120,16 @@
MakeQualifiers(ExprTy));
}
case UnaryOperator::PreInc:
- case UnaryOperator::PreDec:
- return EmitUnsupportedLValue(E, "pre-inc/dec expression");
+ case UnaryOperator::PreDec: {
+ LValue LV = EmitLValue(E->getSubExpr());
+ bool isInc = E->getOpcode() == UnaryOperator::PreInc;
+
+ if (E->getType()->isAnyComplexType())
+ EmitComplexPrePostIncDec(E, LV, isInc, true/*isPre*/);
+ else
+ EmitScalarPrePostIncDec(E, LV, isInc, true/*isPre*/);
+ return LV;
+ }
}
}
diff --git a/clang/test/CodeGenCXX/expr.cpp b/clang/test/CodeGenCXX/expr.cpp
index 6d641dc..d92cfb4 100644
--- a/clang/test/CodeGenCXX/expr.cpp
+++ b/clang/test/CodeGenCXX/expr.cpp
@@ -10,3 +10,7 @@
char *xpto;
while ( true && xpto[0] );
}
+
+// PR5514
+int a;
+void test2() { ++a+=10; }